## What do you want help with?

1. Up & downloading aplets, programs & notes.
2. Manuals and miscellaneous information.
1. "Using the hp 39gs & 40gs effectively" (a free download)
2. "Mastering the hp 39gs & 40gs" (a free download)
3. "Mastering the hp 39g+" (a free download)
4. "Mastering the HP38G"
5. Official HP sites
These include official manuals, the latest software, HPs aplets and learning modules.
6. A CAS manual for the HP40G & hp 40gs
7. Extra CAS commands.
8. Teaching Calculus with an HP.
9. Tips & Tricks for using Word effectively.
10. The HP39G Newsletter by Michaël De Coninck.
11. US vs W.A. - a comparison.
.
3. Programming. .
4. Teaching Exemplars and Worksheets.
The list below is a series (small so far) of worksheets submitted by the HP User Group in Western Australia.  These are simply worksheets that have worked for teachers in the group and that may be of use to others. If you have ideas then I would love to hear from you.
..

#### Topic

Craig
Davis
"This is a worksheet I have used to investigate the derivative of e that has worked quite well."
###### 11.2kB
Debbie
Lee
A paper with ideas to help when investigating derivatives of trig functions and ex.
###### 55.4kB
Tony
Robb
This is a very nice investigation into piecewise defined linear function.  A validation test is included, plus fully worked solutions.
###### 399kB
Colin
Croft
This is a wonderful activity that I did with my Intro Calc class which used piecewise defined functions to produce pictures.
###### 106kB

1. Tips & Tricks for efficient use. How to graph Box and Whisker graphs in the Statistics aplet. How to unlock a frozen calculator, hopefully without losing data. Capturing screens using the Connectivity software. Graphing and using composite functions. How to delete downloaded aplets from the calculator. Some examples of downloaded aplets. Dealing with fields of slopes and curve families with the aid of an aplet. Finding and accessing polynomial roots. Finding nice axes and using Auto Scale effectively. What is Flash ROM and why does the calculator have it? Dealing with fractions effectively on the HP. How do I develop the gradient as the limiting value of a chord? How can I use the Chi-Squared test as an Inference test? Using PLOT values in further integration. What do the values mean in the Memory Manager? What functions do you use most often from the MATH menu? How can I find nice scales in Plot-Table? How can I graph piecewise-defined functions? Can I reference aplets from within the HOME view? Is there more than one way to solve simultaneous equations? How do I make the calculator do symbolic differentiation? What is this 'Invalid User Function' message? What do the INFO messages in Solve mean? Why is it called 'Signed' area in FCN and how do I use it? How can I view and analyse vector functions and problems? How does the MODES view control the Angle and Number settings? How to recall and use values you've found in the Solve aplet. How to find exact value solutions to trig equations. How to use the VARS button to retrieve Area & Intersection FCN results. How to retrieve coefficients of FIT equations. How to play music on the HP (well... sort of). How to show a phase plot of a predator/prey analysis. An analysis of the predator/prey mathematical model of Vampire Ecology in the Jossverse.  A fun article for Buffy fans by Brian Thomas (ex Stanford University). Yay Buffy! How to retrieve and use Stats vars such as the mean and standard deviation in calculations. How to transfer the FIT equation into the Function aplet. How to set and display the date and time on the HP. Guarding against problems evaluating limits on the HP. Finding and using the complex roots of z. Illustrating rectilinear motion using the Parametric aplet. Finding the imaginary solutions to a complex quadratic. Finding roots and areas using the Function aplet. Using POLYFORM to expand brackets. Solving an exponential growth problem using Stats and Solve. Solving 3x3 linear systems of equations using RREF. Solving and graphing a vector collision using the Parametric aplet. .
2. Care to nominate a topic you think would be useful?