Courtney Case and the Missing Lemons: Educational Version

I never thought my mum’s bad memory would lead me to another case.
It was Friday evening. Mum had spent the afternoon gardening in the front yard and was enjoying a well deserved cup of tea. Dad was helping me with my homework.
I would have been happy to leave it until bedtime Sunday night. Dad was aware of this and decided that we could get it all done tonight. And by “we”, I mean “me”. Dad’s idea of helping was covering the kitchen table in all my books and asking me more questions than my teacher.
Mum didn’t feel like cooking. So she went out for fish and chips.
Half an hour later, Mum was home again. “I’ll just go and get a lemon,” I said.
I went out the back, past the garage and down to the lemon tree in the corner of our yard. Our lemon tree always seems to have lemons on it, no matter what time of year it is.
I stopped, and looked at the lemon tree in surprise. There were hardly any lemons.

Who has stolen the lemons? Can Courtney and her trusty sidekick Laura solve the case?

Ages 7 to 10
Chapter book
Reading level: 3.4
Educational Versions include exercises designed to meet Common Core Standards.