The Jinson Twins, Science Detectives, and The Mystery of Echo Lake by Steven Zeichner.
SO Funny, the air quotes and 'resource recovery and recycling center' and "A" and RA.
Just like a mystery for pre teens, Nancy Drew type mystery or Hardy Boys
Has all the makings of a mystery: map and treasure and mysterious things.
Boys start out trying to find a job for the summer, they are 12 year old twin boys.
One looks like a girl his hair is SO long. They do find a job organizing and old woman's
basement into different categories. Appears to be things from her dead husbands ship.
Some will be kept, some mailed and some sold.
There was even a box of things that Mrs. Gray gave to them to bring home. One such thing
was a scroll with a map drawn on it and some riddles to figure out. It stated that's where
the treasure was. They go to Mr. Benjamin so he can help them with the map and what it
could mean. He's the owner of the junkyard.
Different kids and a man are after them but they don't know why.
Can see how the teaching aids would help kids learn about science: charts, spreadsheets, graphs, etc.
They all head back to Mrs. Gray's house and ask if she can maybe help them solve the mystery.
She can in a way and that's how they start this book out, on their way to Echo Lake to find the treasure.
The yellow jackets almost get them at the lake, and then the other man enters Mrs. Gray house with his gun to get the real treasure.
Love the science things at the end.