| Animation (details) | 38 ENG 24 KB / 12 KB |
 Animation of two seals flipping a ball back and forth. A lot of fun for a gifted group - if you'd like to compose your own then documentation is included in the ZIP files on how to produce animations on the calculator, and on the PC using the ADK (38G only). | |
| By Colin Croft. | 2003-05-20 |
Animation of two seals flipping a ball back and forth. A lot of fun for a gifted group - if you'd like to compose your own then documentation is included in the ZIP files on how to produce animations on the calculator, and on the PC using the ADK (38G only).
This aplet contains sets of bivariate data which have the same summary statistics but totally different 'shapes' when graphed. They illustrate the need to rely on more than just the stats when deciding on whether a linear model is appropriate!
This aplet contains sets of bivariate data which have the same summary statistics but totally different 'shapes' when graphed. They illustrate the need to rely on more than just the stats when deciding on whether a linear model is appropriate!
Supplied along with a worksheet, this aplet encourages the student to deduce the Chain Rule for themselves via a series of pre-loaded examples.
School activity for deducing the Chain Rule.
This aplet uses chords of diminishing lengths to find the limiting gradient at a point. A worksheet leads the student into discovering differentiation. (Used to be called 'A Different Slant').
This aplet uses chords of diminishing lengths to find the limiting gradient at a point. A worksheet leads the student into discovering differentiation. (Used to be called 'A Different Slant').
School activity for investigating some interesting graphs which create Christmas tree style plots.
School activity for investigating some interesting graphs which create Christmas tree style plots.
This aplet investigates the common charity game consisting of tossing of a coin onto a square grid. It requires only knowledge of quadratic functions and can be used at a number of levels: to illustrate the convergence of experimental values towards theoretical ones, to investigate fitting a quadratic curve to experimental data, and to introduce the idea of a probability function.
This aplet investigates the common charity game consisting of tossing of a coin onto a square grid. It requires only knowledge of quadratic functions and can be used at a number of levels: to illustrate the convergence of experimental values towards theoretical ones, to investigate fitting a quadratic curve to experimental data, and to introduce the idea of a probability function.
This aplet takes a vector problem involving two objects having an initial position and velocity and analyses it as 'closest approach' style problem. A test tool rather than a teaching tool.
This aplet takes a vector problem involving two objects having an initial position and velocity and analyzes it as 'closest approach' style problem. A test tool rather than a teaching tool.
Uses upper and lower rectangles to find the areas under supplied curves. A worksheet then takes the student through the process of deducing the rules of integration.
It uses upper and lower rectangles to find the areas under supplied curves. A worksheet then takes the student through the process of deducing the rules of integration.
This aplet uses visual methods to illustrate and introduce the Poisson distribution, through the sowing of dandelion seeds into a large patch of ground, which is then broken up into unit squares.
This aplet uses visual methods to illustrate and introduce the Poisson distribution, through the sowing of dandelion seeds into a large patch of ground, which is then broken up into unit squares.
This aplet provides simple drill practice for students learning the laws of indices, with the option of including negative powers. It presents students with practice problems in correct mathematical layout and then allows them to enter the simplified answer. There are a wide variety of styles of problems. It will then tell them if they are right or wrong, offering a second chance if needed.
This aplet provides simple drill practice for students learning the laws of indices, with the option of including negative powers. It presents students with practice problems in correct mathematical layout and then allows them to enter the simplified answer. There are a wide variety of styles of problems. It will then tell them if they are right or wrong, offering a second chance if needed.
This is a copy of the function aplet with the additional ability to graph inequalities (linear/non-linear) for F1, F2 and F3(X). These can be overlaid to show intersections or unions.
This is a copy of the function aplet with the additional ability to graph inequalities (linear/non-linear) for F1, F2 and F3(X). These can be overlaid to show intersections or unions.
An aplet similar to the Quadratic and Trig Explorers (but not as fast) which allows the student to explore linear graphs. The equation of the graph is displayed at the top left corner of the screen and the student can change the gradient and y-intercept using the arrow keys. Intercepts are shown on the screen.
An aplet similar to the Quadratic and Trig Explorers (but not as fast) which allows the student to explore linear graphs. The equation of the graph is displayed at the top left corner of the screen and the student can change the gradient and y-intercept using the arrow keys. Intercepts are shown on the screen.
The student nominates what they think is the line of best fit for a set of bivariate data. They can then adjust the line interactively, seeing the effect on the sum of squares of residuals.
The student nominates what they think is the line of best fit for a set of bivariate data. They can then adjust the line interactively, seeing the effect on the sum of squares of residuals.
This aplet visually solves linear programming problems, finding the vertices of the feasible region and the max/min of an objective function. The final stage of finding the vertices is a bit slow but the result is very impressive. It's a wonderful tool for teachers marking test papers - it lets you easily check whether a student's feasible region is correct if they have their constraints wrong. That's why I originally wrote it: sheer frustration after the 20th paper that had to be reworked from scratch to assign part marks.
This aplet visually solves linear programming problems, finding the vertices of the feasible region and the max/min of an objective function. The final stage of finding the vertices is a bit slow but the result is very impressive. It's a wonderful tool for teachers marking test papers - it lets you easily check whether a student's feasible region is correct if they have their constraints wrong. That's why I orginally wrote it: sheer frustration after the 20th paper that had to be reworked from scratch to assign part marks.
This is one of those "must have" aplets for students who solve problems involving borrowing money and making regular repayments. Once you have it on your calculator all you have to do is store the amount borrowed into P, the interest rate in to R and the amount being repaid into A and the aplet will then show you the remaining principal and interest charged each year/month/quarter.
School activity designed to investigate the visual representation of the iterative process, and the effects on the iterative process of choosing "unstable" initial values.
School activity designed to investigate the visual representation of the iterative process, and the effects on the iterative process of choosing "unstable" initial values.
An essential tool for any student going into an exam which involves probability functions. This is two copies of the Solve aplet with equations pre-entered for Discrete and Continuous probability density functions respectively. Covers the Binomial distribution (individual and cumulative), the Poisson distribution (individual and cumulative), the Exponential function, the Normal distribution, plus more.
An essential tool for any student going into an exam which involves probability functions. This is two copies of the Solve aplet with equations pre-entered for Discrete and Continuous probability density functions respectively. Covers the Binomial distribution (individual and cumulative), the Poisson distribution (individual and cumulative), the Exponential function, the Normal distribution, plus more.
Very well written HP 38G Aplet. This allows students to investigate the behavior of the graph of y=a(x+h)2+v as the values of a, h and v change. This can be done both by manipulating the equation and seeing the change in the graph, and by manipulating the graph and seeing the change in the equation.
This is an aplet which lets you explore the relationship between the focus and the directrix of a quadratic equation/graph.
This is an aplet which lets you explore the relationship between the focus and the directrix of a quadratic equation/graph.
School activity designed to investigate the use of elementary row operations in the reduction and/or solution of a 3 by 3 system of linear equations expressed as an augmented matrix.
School activity designed to investigate the use of elementary row operations in the reduction and/or solution of a 3 by 3 system of linear equations expressed as an augmented matrix.
School activity designed to simulate sets of observations on various discrete and continuous random variables. These can be used in test problems or exercises, or as aids in teaching the topic of random variables.
School activity designed to simulate sets of observations on various discrete and continuous random variables. These can be used in test problems or exercises, or as aids in teaching the topic of random variables.
School activity designed to investigate the definitions of sine, cosine and tangent on the Unit circle. These can be used in test problems or exercises, or as aids in teaching the topic of random variables.
School activity designed to investigate the definitions of sine, cosine and tangent on the Unit circle. These can be used in test problems or exercises, or as aids in teaching the topic of random variables.
School activity designed to investigate the production of a field of slopes from a derivative function stored in F1(X), and the drawing of multiple possible integrals given starting points (x,y).
School activity designed to investigate the production of a field of slopes from a derivative function stored in F1(X), and the drawing of multiple possible integrals given starting points (x,y).
School activity designed to investigate a problem in optimization where they are required to maximize the volume by manipulating a single variable.
School activity designed to investigate a problem in optimization where they are required to maximize the volume or minimize the surface area by manipulating a single variable.
School activity designed to investigate the change in the gradient of a tangent line as the point of tangency moves along the function.
School activity designed to investigate the change in the gradient of a tangent line as the point of tangency moves along the function.
This is a collection of small programs you can type in yourself or download. They perform a multitude of small tasks, some that are so easy you'll wonder why I wrote a program for them, some that are really cool. Mostly math programs, for numeric, trigonometric, complex, linear, and cubic calculations, plus probability, matrix, finance, statistics, and more.
This is a collection of small programs you can type in yourself or download. They perform a multitude of small tasks, some that are so easy you'll wonder why I wrote a program for them, some that are really cool. Separated into two parts, because there are too many programs to fit all in the 38's memory at once. Mostly math programs, for numeric, trigonometric, complex, linear, and cubic calculations, plus probability, matrix, finance, statistics, and more.
School activity designed to easily and quickly analyze Time Series style data, by calculating moving averages (3, 4 and 5 point), seasonal residuals, trend lines and seasonally adjusted data. It more a working tool, rather than an investigative tool.
School activity designed to easily and quickly analyze Time Series style data, by calculating moving averages (3, 4 & 5 point), seasonal residuals, trend lines and seasonally adjusted data. It more a working tool, rather than an investigative tool.
You may be aware that one of the problems with the HP39G and HP40G is that whole rows or columns of keys will occasionally stop working. If you can still access the APLET view and the screen keys then this aplet will transfer you into the Program or Note views so that you can use SAVE/RECV to save them to a PC (assuming that you have a cable) before getting your calculator replaced.
This is an easy adaption of the Parametric aplet which allows the student to investigate geometric transformations using 2x2 matrices. It is a fantastic teaching tool - my class deduced all the basic 2x2 transformation matrices for themselves in less than an hour.
This is an easy adaption of the Parametric aplet which allows the student to investigate geometric transformations using 2x2 matrices. It is a fantastic teaching tool - my class deduced all the basic 2x2 transformation matrices for themselves in less than an hour.
Very well written HP 38G Aplet. This allows students to investigate the behavior of the graph of y=a sin(bx+c)+d as the values of a, b, c and d change. This can be done both by manipulating the equation and seeing the change in the graph, and by manipulating the graph and seeing the change in the equation.
School activity designed to investigate the relationship between the position, velocity and acceleration vectors for functions defined in the form (x(t),y(t)).
School activity designed to investigate the relationship between the position, velocity and acceleration vectors for functions defined in the form (x(t),y(t)).