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Oh Hooray! Another Hour of Algebra (OHAHOA)

We celebrated the first **OHAHOA Day** in December 2015 during the Hour of Code Week at a primary school in Hong Kong. While the children gets to learn some very basic ideas of computer, we had a play-testing trial of the Algebra Maze game for a hundred and fifty Year-3 primary school students (2nd Grade in the US school system) as they not only had an hour of computer but merrily "**Oh Hooray! Another Hour of Algebra (OHAHOA)**" playing our Algebra Maze game (Facebook photos)!

OHAHOA is a wickedly funny mnemonic for remembering three formulas in trigonometry. The monograph "Twenty Years Before the Blackboard" contains some remarkably funny ones of OHAHOA:

- **O**h **h**eck! **a**nother **h**our **o**f **a**lgebra (that dates back to 1972 in the Dictionary of Mnemonics)
- Some **o**f **h**er children **a**re **h**aving trouble **o**ver **a**lgebra (that dates back to pre-1968)
- Sin - **oh**! Cos - **ah**! Tan - **o**h/**a**h! (1928)

All these, especially the first one, express a deep sense of frustration in learning mathematics. We hope that OHAHOA Day will evolve into multi-pronged learning: Learning to use a computer to learn mathematics. We want to turn frustration into fun.￼￼￼
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