Two-Line Classroom Calculator

Settings

Display

Projector panelA large copy of the screen and a list of the keys you press, beside the calculator. Needs a wide screen, like a smart board.

Calculator

Reset the calculatorSame as 2nd [RESET]: clears memory A–E, Ans, statistics data, the constant, past entries and mode settings.

Reset the calculator now? This can’t be undone.

Erase everythingRemoves everything this page saved in this browser, including your display preferences.

Erase all saved data for this calculator in this browser?

Privacy

Modes, memory, statistics data and past entries are saved only in this browser on this device, so they are still here after a reload. Nothing is sent anywhere, and there are no accounts.

Keyboard and tips

Using it

Tap the keys, or type. Press 2nd first to use the blue label above a key.
Menus (DRG, PRB, STO▸, DATA and others): move with ◀ ▶, then press =. Press CLEAR to leave a menu.
▲ ▼ scroll back through past entries. Press ◀ or ▶ to edit one, then =.
Fractions: 3 A b/c 1 A b/c 2 is 3½. 2nd [F◂▸D] switches between fraction and decimal.
Statistics: 2nd [STAT], pick 1-VAR or 2-VAR, then DATA to enter points (▼ moves to the next field). STATVAR shows the results.

Keyboard shortcuts

`0`–`9` `.` `+` `-` `*` `/` `^` `(` `)`	Same keys on the calculator
`Enter` or `=`	= (ENTER)
`Esc`	CLEAR
`Backspace` `Delete`	Delete left of the cursor / DEL
Arrow keys	◀ ▶ ▲ ▼
`	2nd
`_` or `~`	(−) negative
`f`	A b/c (fraction)
`F`	2nd [F◂▸D]
`s` `c` `t` / `S` `C` `T`	SIN COS TAN / inverse
`l` `n` / `L` `N`	LOG LN / 10ˣ eˣ
`q` `r` `i`	x² √ x⁻¹
`p` `a` `e`	π ANS EE
`%` `,` `!`	% comma factorial
`d` `m` `k` `h`	DRG MEMVAR STO▸ HYP

Shortcuts press the real calculator keys, so the projector panel shows students the keys they would press on their own calculator.

Differences from the real calculator

The top line shows a few more characters than the real 11-character screen, so long entries scroll less.
RAND uses its own random sequence, so seeded values differ from the real calculator’s.
In the DATA editor, clearing an X value and moving off it removes that data point.
There is no automatic power-off. ON + CLEAR held together resets only with a touch screen; with a mouse, use 2nd [RESET].
The real calculator gives a SYNTAX error when more than 23 operations or 8 values are left waiting in one entry. This one doesn’t set that limit.
Errors show the error name on the top line and ERROR below it.