do these cards include key signatures?

Yes they do have key signatures, both treble a bass clef's

Why are these double the price printed on the front card?

Among other things, Amazon fees. They charge sellers not only on the price of the item, but they charge on the shipping charge as well. Basic math. If Amazon didn't charge any fees the prices would come down. It will be a cold day in a new ice age when that happens. On low cost items it is almost impossible to sell at the "recommended price" which is what is printed on the item. In a store the seller doesn't have to pay 20%, 25%, 30%, 35% and so on (depending on category) of the selling price to Amazon. If this item was listed in BOOKS it would be worse because the MINIMUM charge from Amazon to sellers is almost $3 and prices would have to go higher yet to make even $1 on it.

Would these be useful for learning trombone music, or are they geared more toward piano? My son's trombone music is exclusively bass clef and below.

They could work. On one side is the note on the bar and the other side is the answer to what note that is. It does show you where on the piano the note is, but that's fine. Doesn't mean you couldn't use it. It wouldn't help him find the placement on his trombone but will help him identify the notes in reading music. The cards will have more than you need since piano covers a wider range of sound. I'll upload a pic of front and back of the cards

Is there a picture of the keyboard on the reverse side?

Yes, providing the answer and allowing you to play the note for quizzing.

Flashcards General Music By Jane Bastien

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Description

🎶 Unlock your inner maestro—one card at a time!

MASTER MUSIC THEORY FAST - 72 cards cover bass & treble clefs plus ledger lines for comprehensive note recognition.
INSTANT FEEDBACK LEARNING - Answers on the back enable self-correction and accelerated progress.
PORTABLE DURABLE DESIGN - Medium-sized cardstock cards fit easily in bags for anytime, anywhere study.
PERFECT FOR ALL AGES LEVELS - Designed for learners from 4.5 years to adults, ideal for students and pros alike.
BOOST YOUR PRACTICE EFFICIENCY - Timed drills motivate faster note naming and measurable improvement.

Flashcards: General Music by Jane Bastien offers 72 durable, medium-sized cards featuring all common notes on bass and treble clefs, including ledger lines, intervals, and music signs. Designed for learners aged 4.5 to adult, these cards provide instant answer feedback and support timed practice to accelerate music theory mastery. Highly rated by educators, they combine portability with effective, measurable learning.

Specifications

ASIN	B005IORR22
Age Range Description	Adult
Brand Name	Kjos Music Company
Customer Reviews	4.7 4.7 out of 5 stars (513)
Educational Objective	Music Theory
Included Components	Music Theory
Item Dimensions	5.5 x 3 x 0.75 inches
Item Weight	3.84 ounces
Manufacturer	Jane Smisor Bastien
Manufacturer Part Number	BKBASTMUSIC
Manufacturer recommended age	18 years and up
Material Type	Cardstock
Model Number	BHBAZUSM21M1690
Number of Items	1
Number of Pieces	72
Set Name	General Music
Size	Medium
Theme	Music
UPC	084027012611

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₨13431

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In stock

Sold byAmazon Sri LankaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Sri Lanka.

Secure transaction

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