The institute can be accessed from two locations

1) The yellow star icon on the left side of the go button on the game tool bar

2) clicking on the building on the main game screen

Tactic scrolls can be gained as rewards from the following locations

1) Campaign maps, they are rewards for getting one or more stars in certain maps in the campaign.
2) As a reward in the guild battle. This can happen at the end of a battle against a opponent in the guild battle. The tactic scrolls are not a guaranteed reward

Fame

Fame is required to unlock each new study option in the institute.

Fame can be gained from the arena ( attacking and defeating opponents ) Pitched battle ( attacking and defeating opponents ) Graveyard ( quest rewards )

To check your current fame status, go to the town hall and click on the status button



Study various hero boosts here

Resistance	Tactic scrolls	Silver	Boost	Fame Reg	Block	Tactic scrolls	Silver	Boost	Fame Req
Level 1	Tactic Scroll x1	10k	5% Def against horseman	0	Level 1	Tactic Scrolls x3	80k	Increase 5% block of infantry	6000
Level 2	Tactic Scroll x2	20k	10% Def against horseman	300	Level 2	Tactic Scrolls x3	110k	Increase 10% block of infantry	10k
Level 3	Tactic Scroll x2	30k	15% Def against horseman	600	Level 3	Tactic Scrolls x3	140k	Increase 15% block of infantry	14k
Level 4	Tactic Scroll x2	40k	20% Def against horseman	1000	Level 4	Tactic Scrolls x4	170k	Increase 20% block of infantry	18k
Level 5	Tactic Scroll x2	50k	25% Def against horseman	6000	Level 5	Tactic Scrolls x4	200k	Increase 25% block of infantry	22k
Assault	Tactic scrolls	Silver	Boost	Fame Req	Shield	Tactic Scrolls	Silver	Boost	Fame Req
Level 1	Tactic Scrolls x5	230k	Increase 5% ATK on horseman	22k	Level 1	Tactic Scrolls x6	380k	Increase 5% def of infantry	46k
Level 2	Tactic Scrolls x5	260k	Increase 10% Atk on horseman	28k	Level 2	Tactic Scrolls x7	410k	Increase 10% def of infantry	54k
Level 3	Tactic Scrolls x5	290k	Increase 15% ATK on horseman	34k	Level 3	Tactic Scrolls x7	440k	Increase 15% def of infantry	62k
Level 4	Tactic Scrolls x6	320k	Increase 20% ATK on horseman	40k	Level 4	Tactic Scrolls x7	470k	Increase 20% def of infantry	70k
level 5	Tactic Scrolls x6	350k	Increase 25% Atk on horseman	46k	Level 5	Tactic Scrolls x8	500k	Increase 25% def of infantry	78k